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- 68067230 alternative "Airspace utilization.".
- 68067230 contributor B1877415.
- 68067230 contributor B1877416.
- 68067230 created "1968.".
- 68067230 date "1968".
- 68067230 date "1968.".
- 68067230 dateCopyrighted "1968.".
- 68067230 description "Includes bibliographies.".
- 68067230 extent "vii, 91 p.".
- 68067230 issued "1968".
- 68067230 issued "1968.".
- 68067230 language "eng".
- 68067230 publisher "Washington, U.S. Dept. of Transportation, Bureau of Public Roads; for sale by the Supt. of Docs., U.S. Govt. Print. Off.,".
- 68067230 subject "388.1".
- 68067230 subject "Express highways Airspace utilization.".
- 68067230 subject "HE355.8 .R42".
- 68067230 title "A study of airspace utilization.".
- 68067230 type "text".